<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app"></div>

  <template id="my-app">
    <div :style="{color: 'red'}">哈哈哈</div>
    <div :style="{color: finalColor}">嘿嘿嘿</div>
    <div :style="{fontSize: '30px'}">哟哟哟</div>
    <div :style="{fontSize: finalFontSize + 'px'}">啊这</div>
    <div :style="finalObj">嘻嘻嘻</div>
    <div :style="getStyleObj()">嗯嗯嗯</div>
  </template>
  <script src="../js/vue.js"></script>
  <script>
    const App = {
      template: '#my-app',
      data() {
        return {
          message: 'halo',
          finalColor: 'red',
          finalFontSize: 50,
          finalObj: {
            fontSize: '50px',
            color: 'orange',
            fontWeight: 700
          }
        }
      },
      methods: {
        getStyleObj() {
          return {
            fontSize: '50px',
            color: 'orange',
            fontWeight: 700
          }
        }
      }
    }
    Vue.createApp(App).mount('#app')
  </script>
</body>
</html>